Illegal immigrants faces countless problems in the US. First, getting into the labor force. Illegal immigrant struggle to find job they really want because of legal documentation requirements. Second, getting an education. If you are a college student, you wont be able to receive financial aid.
They can't find freedom. They risk getting deported. No education. No job. No support from the government. So on...
Illegal immigrants face many hardships. They risk getting conned by the people paid to help them enter the country. They also risk dying on the journey. Next, they would have to work labor intensive jobs with no benefits and little pay. They face discrimination. They also risk being caught and deported.
Finding legal work is a major hardship, which in-turn makes it hard to find legal housing, which in-turn makes some people turn to doing illegal activities to make money.